Windows: Work around an oddity when a pipe with no reader is written to.

diff --git a/exec_cmd.c b/exec_cmd.c
index e189caca629262334541ea8313d2931b06e67adf..84db7ee664e78c012221026613c141e126b64bcf 100644 (file)
--- a/exec_cmd.c
+++ b/exec_cmd.c
@@ -4,9 +4,42 @@
 #define MAX_ARGS       32
 
 extern char **environ;
-static const char *builtin_exec_path = GIT_EXEC_PATH;
 static const char *argv_exec_path;
 
+static const char *builtin_exec_path(void)
+{
+#ifndef __MINGW32__
+       return GIT_EXEC_PATH;
+#else
+       int len;
+       char *p, *q, *sl;
+       static char *ep;
+       if (ep)
+               return ep;
+
+       len = strlen(_pgmptr);
+       if (len < 2)
+               return ep = ".";
+
+       p = ep = xmalloc(len+1);
+       q = _pgmptr;
+       sl = NULL;
+       /* copy program name, turn '\\' into '/', skip last part */
+       while ((*p = *q)) {
+               if (*q == '\\' || *q == '/') {
+                       *p = '/';
+                       sl = p;
+               }
+               p++, q++;
+       }
+       if (sl)
+               *sl = '\0';
+       else
+               ep[0] = '.', ep[1] = '\0';
+       return ep;
+#endif
+}
+
 void git_set_argv_exec_path(const char *exec_path)
 {
        argv_exec_path = exec_path;
@@ -26,7 +59,7 @@ const char *git_exec_path(void)
                return env;
        }
 
-       return builtin_exec_path;
+       return builtin_exec_path();
 }
 
 static void add_path(struct strbuf *out, const char *path)
@@ -37,7 +70,7 @@ static void add_path(struct strbuf *out, const char *path)
                else
                        strbuf_addstr(out, make_absolute_path(path));
 
-               strbuf_addch(out, ':');
+               strbuf_addch(out, PATH_SEP);
        }
 }
 
@@ -50,7 +83,7 @@ void setup_path(const char *cmd_path)
 
        add_path(&new_path, argv_exec_path);
        add_path(&new_path, getenv(EXEC_PATH_ENVIRONMENT));
-       add_path(&new_path, builtin_exec_path);
+       add_path(&new_path, builtin_exec_path());
        add_path(&new_path, cmd_path);
 
        if (old_path)